Endoscopy is a procedure that helps to identify problems in the lungs, stomach and lower digestive tract. A bronchoscope is used to detect damage to lung tissue, and a gastroscope - a thin, flexible tube with a light and video camera - is used to look at the esophagus (swallowing tube), stomach, and duodenum (the beginning of the small intestine). Specially trained physicians perform all endoscopic tests.
A colonoscopy is an endoscopic procedure that looks at the inside of the colon (large intestine) for signs of disease, such as polyps, cancer, colitis and diverticulosis.
A screening colonoscopy is done to look for and remove polyps, which could become cancer. Colon cancer is 90 percent curable if caught early.
The American College of Gastroenterology recommends a screening colonoscopy every 10 years starting at age 50 for those who are at average risk for colon cancer. You should speak with your doctor about when a screening test is best for you.